碎屑岩成岩系统与孔隙演化——以三塘湖盆地为例

DIAGENETIC SYSTEM AND PORE EVOLUTION IN CLASTIC ROCK-EXAMPLE FOR SANTANGHU BASIN

何种情况孔隙向增加的方向演化?何种情况孔隙向减小的方向演化?这是寻找和确定有利勘探目标的重要依据之一。笔者认为目前利用成岩作用、成岩演化阶段及成岩相等传统理论对孔隙演化的增减趋势判定存在不确定性,因此本文通过自定义成岩系统这一概念,建立了碎屑岩成岩系统分类以及成岩系统与孔隙演化关系的理论,并以三塘湖盆地牛圈湖背斜为例,运用该理论对有利孔隙带进行了预测,为在该盆地內寻找有利油气勘探目标提供了有效的理论依据。

According to the traditional theory, by using the diagenesis, diagenetic stage and diagenetic facies to determin the pore evolvenent trend, there is uncertainty. in the paper, the theories of classification of diagenetic system and relation between diagenetic system and pore evolvement are found with the concept of diagenetic system defined by ourself. At last we succeed in using this theories to predict favourable pore area in Niuquanhu anticline of Santanghu basin.